Albbet sohmid



2 Sheets-Sheet 1.

Patented Nov. 20 1888.

A. SGHMID. FLUID METER 'aav kssmxmm N, PEtiRs. Phwwunw mpr-m Washington.a. c,

(Model) 2 Sheets-Sheet 2'. A. SGHMID.

FLUID METER, N0. 288,869. Patented Nov. 20, 1883.

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N. PETERS. maxim m Washington. 1Q

' UNITE STATES PATENT O FICE.

ALBERT SCHMID, OF ZURICH, SXVITZERLAND.

FLUID-METER.

SPECIFICATION forming part of Letters Patent No. 288,869, dated November20, 1883.

Application filed May 10, 1883. (Model.) Patented in France March 13,18821). 146,592; in Belgium May 15, 18S2,1\*o. 57,741; in Austria Juiy12, 1882, No. 13,772; in England August 17, 1882, No. 3,937; in GermanyDecember 9, 1882, No. 18,848; in Spain February 15,1883, and in ItalyFebruary .17, 1883, No. 15,103.

To usZZ whom it may concern:

Be it known that I, ALBERT Scnurn, of Zurich, in the canton of Zurich,Switzerland, have invented certain new and useful Improvements inFluid-Meters; and I do hereby declare that the following is a full andexact descrip the feed-pipe and exhaust-pipe of the machine,

the four separate conduit-ports at the center of the cylinder beingformed in a common plane perpendicular to its axis. Each cylinder isfitted with a piston of peculiar construction, described hereinafter,adjusted to work back and forth past the'central ports therein, and toserve thereby each as a cut-off for the opposite cylinder and piston.The piston- .rods from the two cylinders are connected to a commoncrank-shaft at an angle of ninety degrees each with the other, to avoida deadccnter therein, andthis shaft operates the index-hand of a counteradapted to indicate the number of its revolutions, and thereby thestrokes of the pistons. In the operation of the engine the fluid has topass through one piston before it reaches the other, which is then movedby the pressure of said fluid.

In the accompanying drawings, Figure 1 is a vertical. section of theapparatus; Fig. 2, a topview in horizontal section on the line w w ofFig. 1, the section through each piston L L being, however, taken inline 13 18 of Fig. 4, to illustrate the relation of the ports therein tothe portsin the cylinder when they 'are brought into juxtaposition. Fig.3 is a central vertical section, at right angles to the section in Fig.1, through one of the cylinders. Fig. 4c is a longitudinal section, andFigs. 5 and 6 are respectively cross-sections, of one of the pistons.Figs. 7, 8, and 9 arerespect- 5O ively vertical sections of the workingparts of themeter through 14. 14, 15 15, and 16 16 of Fig."10,drawn toillustrate more fully the construction and operation thereof. Fig. 10 isa section through 17 17 of Fig. '7. Fig. 11 is a 55 vertical transversesection through 1818 of Fig. 7. Fig. 12 is an elevation of the piston,and Figs. 13, 14, and 15 are crosssections illustrating fully itsconstruction.

' As will be readily seen the one essential 6O feature of the meter isthe peculiar construction and position of its ports and connectingpassages and of the slide or out off valves adapted thereto, the valvecontrolling the feed and exhaust ports of the one cylinder being 6formed in the middle portion of the piston of the opposite cylinder.

The ineteris preferably constructed as shown in Figs. 1, 2, and 3. Itconsists of a central casing or body, A, open at each end, and with inwhich are formed seats for the two parallel cylinders D D, which arefirmly fitted and secured therein. Each cylinder is pierced cen trall ywith four equal ports in a common plane at right angles to its axis,said ports being designated in the drawings by the letters I) I" G G onthe one piston and b 6 G G on the other. (See Figs. 2 and 10.) The twoinner ports, I) b, of each cylinder are connected, respectively, withthe upper and lower end of 80 the opposite cylinder byindependentpassages c c c 0 formed longitudinally and diagonally in the casting Abetween the cylinders. The two outer ports, G G or G G, in each com municate directly the one with the feed or sup ply pipe F and the other withthe exhaust or discharge pipe F of the meter by means of exteriorpassages, E E, formed in the body of the casting, and to which the feedand exhaust-pipes are connected by suitable coupo lings. The body Arests upon a base-plate, I, which is recessed on its inner face, asshown at J, to establish a connection between the lower end of eachcylinder and the diagonal conduit leading thence to the central port,I), in the opposite cylinder. The base-plate is firmly bolted to thebody A and the joints made tight by suitable packing. By its removal theinterior of the meter will be exposed for inspection and repair. Thecover K is formed of a hollow casting constructed with a centralpartition, (I, dividing it into chambers e 6, one over each cylinder.Acentral bearing is bored through the partition to form the journal-boxof a crank-shaft, f, adapted to revolve therein at right angles to theaxis of the cylinders, so that the cranks g g, formed upon the shaft oneither side of its central journal, will be in line with the axes of thetwo cylinders. These cranks are set at an angle of ninety degrees eachwith the other to avoid a dead-point in rotating the shaft. Openings aremade in the ends of the cover in line with the shaft. In one of these isfitted a journal-box, 70, through which is led a shaft, h, whichoperates the index of a counter, Z. The opposite opening is closed by ascrewcap or plug, 1). An oiling-aperture, i, is

formed in the top of the cover to connect with the bearings of the shaftf for its lubrication. Within the cylinders are fitted the slidingpistons L L. the central portion in each left solid to act as a a cutoffvalve to close the four lateral ports in the middle of the cylinder inpassing over the same. Each piston is perforated transversely with fourindependent ports or passages, two of them, on m, pierced diametricallythrough one end of the piston at right angles to each other, one abovethe other, on one side of the solid central portion, which serves as avalve-face, and the other two, a n, parallel to each other in the otherend of the piston, so that when the one end of the piston is oppositethe four ports in the cylinder the passages communicating with the twoends of the opposite cylinder are connected the one with theexhaust-portand the other into the suppl y-port diametrically opposite,and when the other end of the piston is brought into register with saidopenings the connection is changed, so that the passage which wasconnected with the opposite supply-port is now connected with theadjacent exhaustport, and that which was connected with the exhaust isnow connected with the supply; hence the connection of the two ends ofeach cylinder with the supply and exhaust pipes, respectively, isautomatically cutoff and reversed at each stroke of the piston in theopposite cylinder. This movement of the apparatus is illustrated inFigs. 7., 8, 9, and 10, in which one of the pistons L, is shown at theend of its downstroke and the opposite piston, L, consequently at themiddle of its stroke. In this position the fluid admitted from thesupply-pipe F, passing into the passage E, will flow through the port Gin the cylinder D (see Fig. 8) and through the diagonal or diametricport m in the upper end of the piston L, and will pass down through thepassage or conduitc into the lower end of the opposite cylinder, D, toact against the piston L therein and force it up. At the same timeconnection is established through the These pistons are elongated and.

second diagonal diametric port m in the piston L, between the upperdiagonal conduit 0, communicating with the upper end of the cylinder Dand the exhaust-passage E and pipe F. In the meantime the central valveportion of the piston L, covering the four lateral ports in the middleof the cylinder D, closes for the moment all connection between thecylinders D and the'inlet and exhaust ports. The upward movement of thepiston L will, however, immediately open the ports, and, bringing thetransverse parallel passages in the lower end of the piston intoregister with the inlet-port G and conduit 0 on the one side andtheexhaust-port G and conduit 0 on the other, will thus establishcommunication through these passages between the supplypipe F and thelower end of the cylinder D and the exhaust-pipe and the upper end ofthe same cylinder. The piston L therein will consequently move upward,and in so doing will operate at mid-stroke to cut off and .then reversethe communication of the inlet and exhaust ports with the oppositecylinder, D, when the piston L therein has reached the end of its upwardstroke, so that by means of the parallel passages n in the lower end ofthe piston L the inlet-port will be connected with the upper end of thecylinder D through the upper conduit, 0, and the exhaust with its lowerend through the lower conduit, 0, and the movement of the piston L bethereby reversed. The two pistons thus act each as a cut-off or slidevalve for the other, and being connected with the shaft f by the cranksg g, which work at an angle of ninety degrees each with the other, themotion of the piston and shaft will be continuous and uniform. 4 Thediameter .of each cylinder and length of stroke being known, eachrevolution of the crank shaft f will represent the passage through themeter of a known quantity of fluid, which will be accurately registeredby the index-counter Z, properly graduated and adjusted for thispurpose. The same apparatus may be used as a pump or motor by prolongingthe shaft f outwardly through a stuffing-box to carrya driving-pulley.

I claim as my invention 1. The combination, in afluid meter or motor,with a common crank-shaft and with suitable pistons actuating saidshaft, of two parallel cylinders traversed by said pistons, eachprovided with four lateral ports midway in the length thereof adapted tobe lappedand closed simultaneously by the center of its piston, and tocommunicate, respectively, each independently by suitableconnecting-passages with the top and bottom of the opposite cylinder andwith the supply and ex haust ports of the meter, all substantially inthe manner and for the purpose herein set forth.

2. The combination, in a fluid meter orlmo tor, with parallel cylinders,each provided midway of its length with four lateral ports adapted to beclosed simultaneously by the central portion of the piston movingtherein, and with a common crank-shaft at right angles to saidcylinders, of two pistons, each fitted in one of said cylinders, andconstructed with a central solid portion adapted to lap and close as avalve the lateral ports in the cylinder, and with two paralleltransverse passages on one side of the central valve, and two transversediametric passages formed at right angles to each other, one above theother on the other side of the central valve, each passage adapted toestablish in turn, in the move ment of the piston, communication throughthe piston between the opposite central lateral ports in the cylinder,substantially in the manner and for the purpose herein set forth.

3. The combination, in a fluid meter or m0- tor, of the body A, the twoparallel pistoncylinders or working-chambers D D therein,

the lateral ports b and connecting-passages c in and between thecylinders, the base or bed plate I, supporting the body, the cover K,the central journal-bearing, d, dividing the cover interiorly into twochambers above the cylinders, the crank-shaft f, rotating within thecover, the indicating-shaft and counter Z, and the pistons L L,constructed with transverse passages m n on either side of a centralvalvesurface, all combined and connected substantially'in the manner andfor the purpose herein set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses. V

ALBERT SOHMID. Witnesses:

T. A. BOURRY, A. WV. STEIGER.

